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Friedelite
Friedelite

Anhydrite
Anhydrite



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Friedelite
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Anhydrite

Friedelite and Anhydrite Optical Properties

Optical Properties

Luster

-
Pearly, Greasy

Pleochroism

-
For violet varieties

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Translucent
Transparent

Refractive Index

1.627-1.6631.570-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Orthorhombic

Birefringence

0.032-0.0350.042-0.044
0 0.296
👆🏻

Clarity

Translucent
Transparent

Friedelite and Anhydrite Optic Character

Friedelite and Anhydrite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Friedelite and Anhydrite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Friedelite and Anhydrite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Friedelite and Anhydrite Transparency

Similar to their colors, Friedelite and Anhydrite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Friedelite is Translucent while Friedelite is Translucent in appearance.